| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Observation of Metal Particle Deformation inside a Shock Compressed Polymer |
| Author(s) |
David Bober, Moono Rhee, Nathan Barton, Mukul Kumar |
| On-Site Speaker (Planned) |
David Bober |
| Abstract Scope |
The shock compression of particulate composites is affected by matrix-particle interactions, which are in turn affected by particle size, shape and distribution, i.e. microstructure. With applications ranging from structural to reactive materials, we wish to understand how these microstructural properties evolve during dynamic compression. To that end, high speed radiography was used to provide in situ images of shock induced deformation in a model polymer-metal composite. The entrained metal microparticles (50-100 µm) were seen to remain approximately spherical for relative polymer velocities up to 1.7 km/s, but above 3.2 km/s the particles experienced large plastic deformation. The strength of the metal particles, the shear resistance of the polymer, and interfacial stresses were considered using finite element simulations. The effect of changing the polymer/metal combination will also be discussed.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Undecided |